Indow-scaffold



(No Model.) 2 SheetsSheet 1.

J. BTTLIN.

WINDOW SOAFPOLD.

Patented Oct. 19 1886.

(No Model.) 2- Sheets-Sheet 2.

J. ETTLIN.

WINDOW SGAFFOLD.

No. 360,924. Patented Oct. '19, 1886.

UNTTEE STATES PATENT QFFPCEQ JOHN ETTLIN, OF KANSAS CITY, MISSOURI.

WlNDOW-SCAFFOLD.

SPECIFICEATION forming part of Letters Patent No. 350,924, dated October 19, 1886.

Application filed July 29, 1886.

T (LZZ whom it may c ncern:

Be it known that I, JOHN ETTLIN, of Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in \Vindow-Scaffolds; and I do hereby declare the following to be a full, clear, and exact description of the inveu tion, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in window-scaffolds.

The object of the same is to provide a scaffold which can be easily and quickly adjusted to a window-sill.

A further object is to provide a scaffold which can be folded and packed in a small space.

A still further object is to provide means whereby the scaffold may be adjusted to windew-sills of different widths.

Vith these ends in view my invention consists in certain features of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of my device, showing the chair or scaffold adjusted to a windowsill. Fig. 2 is a detached view of the clamping device. Fig. 3 is a detached view, in section, of one of the sliding sections. Fig. lis a view of one of the metal plates d, and Fig. 5 is an enlarged view of the mechanism for locking the side arms to the chair-back.

A represents a window-sill of any ordinary construction; B, the base of my improved device, the end pieces, a", of which are provided on opposite faces with grooves 1), running longitudinally throughout a portion of their length.

Secured to the end pieces, a", of the base 13 and engaging the grooves 12 are the sliding sections G, the inner ends of which project downwardly below the top of the sill, and are each provided with a clamp-screw, c, which is adapted to be forced against the inside of the windew-sill and hold the inner end of the scaffold Serial No. 209.475. No mndehl Attached to the under side of the bases B, and near its outer edge, are two brackets opposite each other, and adapted to rest on the sill and support the outer edge of the base.

The two end sections, (1., of the base B of the scaffold are connected together by slats I), which serve as a floor or sent to the scaffold.

E E are two uprights, each of which is secured to its respective end sections, a", of the base in swinging adjustment, and project below the same, and terminate in a head or extended bearing E, which is preferably covered with rubber for the purpose of giving it a firm hold, and at the same time prevent the disfiguratiou of the sill or wall.

At suitable distances on the uprights E E, and connecting the same, are bent strips 0, which serreas a back or guard for a person sitting in or standing on the base or bottom of the chair or scail'old.

Pivotally secured to the base 13 are the arms orbraces K, each of which terminate in ratchetteeth 71, and are connected together by means of a rod, 11.. The ratchet-teeth l1. engage pins G, secured to the inner faces of the uprights E E, and serve as a lock for the chair-back. Itigidly secured above these pins G are the springs F, which latter hold the teeth in contact with the pins and prevent accidental dis placement of the arms. The rod h, being behind the uprights E a, prevents the chair or scaffold back from falling backwardly.

When it is desired to remove the scaffold, the ratchet-teeth h are disengaged from the pin G, and the chair-back, then having nothing to support it, is free to be tilted inwardly, which movement carries the lower ends of the uprights away from the sill and leaves the device free to be removed.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts without departing from the spirit and scope of my inventionfor instance, the parts might be made of light and durable metal; hence I do not wish to limit myself to the exact construction herein set forth, but consider myself at liberty to make such changes that fall within the scope and spirit of my in- Vention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a base, one end of which is adapted to bear against the wall be low the inner edge of the sill, of atilting back,

' the lower edge of which engages the outer face of the wall or sill below the lower edge of the latter, and devices for locking the tiltingback in position. 7

2. The combination, with an extensible base, one edge of which is adapted to engage the wall below the inner edge of the sill, of a tilting back, the lower edge of which engages the sill or wall below the'base, and devices for looking the back in an upright position.

3. The combination, with a base, clamps secured to the inner edge thereof, and brackets secured to the lower face of said base, of the tilting back, the lower edge of which engages the outer face of the wall below the base, and devices for locking the back in an upright position.

4. The combination, with a base having grooved end pieces, the sliding sections, thumb-screws for locking the sliding pieces to the end pieces, and the clamping-screws, of the tilting back extending below the base and devices for locking the back in an upright position.

5. The combination, with a base having devices for locking one edge thereof to the sill, of the tilting back, the lower edge of which is arranged to engage the wall below the 'sill, and having pins and springs, and the arms having teeth for engaging the pins, substantially as set forth.

In testimony whereof I have signed this 5 specification in the. presence of two subscribing Witnesses.

J OH N ETTLIN. 

